db-move: Check that the specified repositories are ones dbscripts was configured for

Otherwise if you use the dbscripts for core/extra for community repos,
or vice versa, you'll get an error saying that you don't have
permissions to move packages from or to the given repositories, which
can be confusing if you don't immediately notice your mistake.

Signed-off-by: Johannes Löthberg <johannes@kyriasis.com>
4 jobs for github/fork/kyrias/db-move-check-repos in 13 minutes and 28 seconds (queued for 7 seconds)